I don’t play, but perhaps it has something to do with either Proton or Linux? (I’m assuming you’re mostly a windows player outside of the deck).
You could try running it with DXVK, which does work on Windows, though it’s not officially supported or anything.
Did a full shell swap on mine:
The thing with the screen is you have to pull on one corner (with heat) until that single corner comes up just enough for you to slide some kind of tool underneath to slice the adhesive and separate them better. Then you can move the heat gun around a bit more and move the tool with it to keep cutting through the adhesive.